Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
hyacinthaceae is a noun meaning "one of many families or subfamilies in which some classification systems subdivide the Liliaceae but not widely accepted". It carries one recorded sense.
one of many families or subfamilies in which some classification systems subdivide the Liliaceae but not widely accepted
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for hyacinthaceae come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.